We have a DC4, and it really fits our production needs. Most of the time we print spot color (especially reds and blacks), but when we print photo images it is more than adequate for the task -- I like to compare the print quality to the difference you would see between a photo inkjet printer and a color laser printer -- we don't have much call for photo quality prints; the ones we do need are outsourced. So if you need photo quality prints, look to an inkjet printer. The negatives of the summa: higher consumables, not photo quality. The positives: consistent color, no ink heads to clog, solid as a tank.
Hope that helps!
-g-